Ex.2
1. He was doing his homework all evening yesterday.
2. At 5 p.m. yesterday, they were chatting online.
3. I wasn't reading a book at 9 p.m. yesterday.
4. Was she dancing at the disco at 8 p.m. last night?
Yes, she was.
5. Were they taking an exam yesterday at 7 p.m.?
No, they weren't.
6. While my mum was driving, I listened to music.
